摘要:
A magnetic recording and playback apparatus adapted to decrease tape hiss noises, wherein an amplifier power supply circuit or an output circuit for coupling an output from a recording amplifier to a magnetic head is provided with a capacitor block whose internal loss decreases as frequency increases and consisting of a plurality of capacitors. The capacitor block is formed by connecting with an electrolytic capacitor of a large capacitance included in the power supply circuit or output circuit at least one nonpolarized capacitor having a smaller capacitance and smaller internal loss than the electrolytic capacitor.
摘要:
In an audio frequency transistor amplifier comprising an output amplifier circuit to be coupled to a load, a preceding stage amplifier circuit coupled to the input of the output amplifier circuit, and a negative feedback circuit including a DC blocking electrolytic capacitor or polarized capacitor coupled between the output amplifier circuit and the preceding stage amplifier circuit to feed the output signal of the output amplifier circuit back to the preceding stage amplifier circuit, the electrolytic capacitor, when an audio signal to be amplified is fed back to pass therethrough, generates harmonics of the audio signal due to its nonlinear property, thereby to cause a decrease in the articulation and resolution of reproduced sound. The invention resides in coupling in parallel, in order to eliminate or reduce the harmonic noises generated by the electrolytic capacitor, a nonpolarized capacitor having a much smaller loss than the electrolytic capacitor to the same. For the purpose of raising the harmonic noise eliminating or reducing effect, a plurality of nonpolarized capacitors may be coupled in parallel to the electrolytic capacitor.
摘要:
Disclosed is a process for producing an ortho-metalated 1:3 complex of iridium with homoligands which is useful as a luminous material for an organic EL device in high yield at high purity in a short time by a simple procedure. An example of the complex is tris(2-phenylpyridine)iridium(III) and this complex can be produced by reacting iridium(III) acetylacetonate with an organic ligand consisting of 2-phenylpyridine in the copresence of an acidic substance, either an organic acid such as tartaric acid or an inorganic acid such as phosphoric acid.
摘要:
Provided is an underwater posture stabilization system which, by being attached to various underwater equipment such as undersea equipment and underwater vehicles having different shapes and positions of the center of gravity according to their purpose and the like, allows simply and reliably setting their posture in water (basic posture), is excellent in versatility, is not only excellent in posture stability since, when the posture inclines under the effect and the like of tidal currents and pulsating currents, a moment to restore the posture to its original posture naturally acts, but is also capable of easily changing the posture as needed, and also is capable of stably controlling the posture even in the presence of complicated tidal currents and pulsating currents, and is excellent in reliability, stability, and certainty of posture control. The underwater posture stabilization system includes a frame to be attached to an apparatus body of the underwater equipment, a pair of sliding portions arranged so as to be freely movable back and forth on both side portions of the frame, a support member freely movable up and down which is fixed at a lower end thereof to each sliding portion, and arranged upward or obliquely upward, and a floating body arranged at a tip of each support member.
摘要:
Disclosed are an aluminum chelate complex capable of stabilizing the degree of vacuum in a film-forming chamber in the vapor deposition step and producing efficiently a high-quality organic EL device which shows excellent reliability and durability in practical use and an organic EL device using the said aluminum chelate complex. The aluminum chelate complex useful as an organic EL material is represented by L1Al(L2)2, contains 0.6 mol % or less of a complex represented by Al(L2)3, and is obtained by reacting an aluminum alkoxide with a quinolinol derivative and then with a phenolic compound and purifying the resulting complex to a high degree. In the formulas, L1 denotes a phenolate ligand and L2 denotes a substituted quinolinolate ligand.
摘要:
A bearing seal that is designed so that it can be mounted between one element and the other element of a bearing rotating relative to each other, thereby sealing the bearing. The bearing seal includes a seal ring and a seal body. The seal ring and seal body being adapted to be fitted on and secured to the one element and other element of the bearing rotating relative to each other, respectively. The seal ring includes a first cylindrical portion extending in the axial direction of the bearing and adapted to be fitted on and secured to the peripheral wall of the one element rotating relative to the other element of the bearing, a flange portion extending from the first cylindrical portion toward the radial direction, and a second cylindrical portion extending from the forward end side of the flange portion toward the axial direction of the bearing. The seal body includes a reinforcing ring having a radial one end side adapted to be fitted on and secured to the peripheral wall of the other element rotating relative to the one element of the bearing and having the other end side extending toward the seal ring and an elastic element reinforced by the reinforcing ring. Upon the seal ring and seal body being mounted in the bearing, the elastic element includes a first lip portion, s second lip portion and a third lip portion. The first lip portion is extending from the reinforcing ring toward the radial other end side and adapted to make sliding contact with the peripheral wall of the first cylindrical portion of the seal ring. The second lip portion, located axially of the bearing and inwardly of the first lip portion, is extending from the reinforcing ring toward the radial other end side and adapted to make sliding contact with the peripheral wall of the first cylindrical portion of the seal ring. The third lip portion, located axially of the bearing and inwardly of the second lip portion, is extending from the reinforcing ring toward the radial direction and adapted to make sliding contact with the peripheral wall of the second cylindrical portion of the seal ring.
摘要:
In the present invention, after a nitriding process is performed on a steel, a passivating process in which the steel is heated under an atmosphere containing oxygen is performed. The heating condition of the passivating process is within a range surrounded by (100° C., 120 min), (100° C., 10 min), (125° C., 5 min), (190° C., 5 min), (200° C., 10 min), (200° C., 20 min), (190° C., 30 min), (190° C., 40 min), (180° C., 60 min), and (180° C., 120 min) on coordinate axes of temperature and time. In the process for production of the nitrided steel, uniform passivated layer can be easily formed, and fatigue strength is improved as pitting corrosion resistance is improved.
摘要:
This invention relates to a method for sublimation refining which gives a high-purity product in high yield while preventing corrosion of the apparatus, contamination of the product and change in quality of the product and to an apparatus useful for the method. The apparatus of this invention for sublimation refining comprises a heat generating unit made of a material generating heat by electromagnetic induction, sublimating unit A and collecting units B and C, respectively independently controllable in temperature by electromagnetic induction heating and the inner surface or the inner tube of the sublimating or collecting unit is made of a material like metal and ceramic inert to sublimable substances. According to the method of this invention for sublimation refining, a sublimable substance is introduced to sublimating unit A, the sublimating unit is heated by electromagnetic induction thereby sublimating the sublimable substance, the sublimate is introduced to collecting unit B containing a zone controlled in temperature by electromagnetic induction heating and the object sublimable substance is collected.
摘要:
For receiving clear image data of symbols applied to the front surface or back surface of an article that is moved by, for example, a conveyor and for which the reading distance is constantly changing, a symbol reading device is provided with an image data input focus point control section that outputs position data of the article from a front surface/back surface position detector to an image data input focus point modifier such that the focus point of a camera or waist position of a laser beam for image data input can be constantly matched to the front surface or back surface of the article.
摘要:
In manufacturing an exhaust pipe of two-passage construction, a metallic plate having a first end and a second end respectively elongated in a longitudinal direction of the exhaust pipe is prepared. The metallic plate is bent into a substantially S shape in cross section. It has a diametrically extending central partition plate and a substantially semicircular peripheral wall on each lateral side of said partition plate in such a manner that a groove of substantially V shape in cross section having a substantially closed end on a radially inner side and an open end on a radially outer side is formed at each diametrically outer portion of the partition plate. A target is provided so as to elongate along the groove in a manner to extend substantially radially outward from the closed end. A welding arc is generated between the target and a welding gun disposed on a side of the open end such that the substantially closed end and the target are welded together.